// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/base/touch/touch_device.h"

#include "base/logging.h"
#include "ui/events/devices/device_data_manager.h"

namespace ui {

namespace {

    bool IsTouchDevicePresent()
    {
        return !DeviceDataManager::GetInstance()->touchscreen_devices().empty();
    }

} // namespace

TouchScreensAvailability GetTouchScreensAvailability()
{
    if (!IsTouchDevicePresent())
        return TouchScreensAvailability::NONE;

    return DeviceDataManager::GetInstance()->AreTouchscreensEnabled() ? TouchScreensAvailability::ENABLED : TouchScreensAvailability::DISABLED;
}

int MaxTouchPoints()
{
    int max_touch = 0;
    const std::vector<ui::TouchscreenDevice>& touchscreen_devices = ui::DeviceDataManager::GetInstance()->touchscreen_devices();
    for (const ui::TouchscreenDevice& device : touchscreen_devices) {
        if (device.touch_points > max_touch)
            max_touch = device.touch_points;
    }
    return max_touch;
}

// TODO(mustaq@chromium.org): Use mouse detection logic. crbug.com/495634
int GetAvailablePointerTypes()
{
    // Assume a mouse is there
    int available_pointer_types = POINTER_TYPE_FINE;
    if (IsTouchDevicePresent())
        available_pointer_types |= POINTER_TYPE_COARSE;

    DCHECK(available_pointer_types);
    return available_pointer_types;
}

PointerType GetPrimaryPointerType()
{
    int available_pointer_types = GetAvailablePointerTypes();
    if (available_pointer_types & POINTER_TYPE_FINE)
        return POINTER_TYPE_FINE;
    if (available_pointer_types & POINTER_TYPE_COARSE)
        return POINTER_TYPE_COARSE;
    DCHECK_EQ(available_pointer_types, POINTER_TYPE_NONE);
    return POINTER_TYPE_NONE;
}

// TODO(mustaq@chromium.org): Use mouse detection logic. crbug.com/495634
int GetAvailableHoverTypes()
{
    // Assume a mouse is there
    int available_hover_types = HOVER_TYPE_HOVER;
    if (IsTouchDevicePresent())
        available_hover_types |= HOVER_TYPE_ON_DEMAND;

    DCHECK(available_hover_types);
    return available_hover_types;
}

HoverType GetPrimaryHoverType()
{
    int available_hover_types = GetAvailableHoverTypes();
    if (available_hover_types & HOVER_TYPE_HOVER)
        return HOVER_TYPE_HOVER;
    if (available_hover_types & HOVER_TYPE_ON_DEMAND)
        return HOVER_TYPE_ON_DEMAND;
    DCHECK_EQ(available_hover_types, HOVER_TYPE_NONE);
    return HOVER_TYPE_NONE;
}

} // namespace ui
